CN103961997B - A kind of ammonium metavanadate roaster gives off the recovery process of tail gas - Google Patents

A kind of ammonium metavanadate roaster gives off the recovery process of tail gas Download PDF

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CN103961997B
CN103961997B CN201410231597.0A CN201410231597A CN103961997B CN 103961997 B CN103961997 B CN 103961997B CN 201410231597 A CN201410231597 A CN 201410231597A CN 103961997 B CN103961997 B CN 103961997B
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tower
gas
tail gas
roaster
recovery
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CN103961997A (en
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张春雨
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HUNAN ZHONGXIN NEW MATERIALS TECHNOLOGY Co Ltd
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HUNAN ZHONGXIN NEW MATERIALS TECHNOLOGY Co Ltd
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Abstract

The present invention relates to the recovery process that a kind of ammonium metavanadate roaster gives off tail gas.Be emission is used water as into absorbing liquid, under the rare earth coating catalytic action in high-efficiency cyclone water scrubber, make ammonia in water, form low-temperature plasma absorbing liquid; Low-temperature plasma absorbing liquid contacts with tail gas to absorb and forms water lotion, jointly absorbs uprising gas at the bottom of efficient pickling tower, liquid after the absorption produced with dilute sulfuric acid, then discharge after sending activated carbon adsorber to adsorb.It is few that the present invention adopts required absorbent consumption, and vent gas treatment efficiency is high.

Description

A kind of ammonium metavanadate roaster gives off the recovery process of tail gas
Technical field
The present invention relates to a kind of industrial waste gas processing method, be specifically related to the recovery process that a kind of ammonium metavanadate roaster gives off tail gas.
Background technology
It is all adopt ammonium vanadate to make in roaster high-temperature roasting that prior art produces vanadic anhydride, it is ammonia, carbon dioxide, carbon monoxide, steam and micro-dust that production process discharges main component in tail gas, these tail gas with penetrating odor can bring harmful effect to the physical and mental health of workshop workman, if this tail gas is directly discharged in surrounding environment without process, the normal life of surrounding resident can be had a strong impact on.In order to reduce the impact of peculiar smell tail gas on health and environment, need to take corresponding treatment measures.
But the ammonia concentration of above-mentioned tail gas is not high, directly adopt pickling to absorb, sulfuric acid liquid losing quantity is large, and treatment effeciency is quite low.
Summary of the invention
The deficiency that the present invention exists to overcome prior art, provide a kind of ammonium metavanadate roaster to give off the recovery process of tail gas, the exhaust treatment efficiency of this processing method is higher.
The present invention is achieved by the following technical solutions: a kind of ammonium metavanadate roaster gives off the recovery process of tail gas, on the roaster of ammonium metavanadate calcination department, arrange the tail gas of gas skirt to discharge collect, all floss holes in workshop are parallel to a total pipeline, total pipeline leads to the clarifier-tank causing outdoor through centrifugal high pressure air-introduced machine, carry out cooling dust removal process, exhaust temperature is down between 60 DEG C-80 DEG C; Ammonia absorption system is sent into from clarifier-tank gas part airduct out; In ammonia absorption system, first use water as absorbing liquid, under the rare earth coating catalytic action in high-efficiency cyclone water scrubber, make the reaction of ammonia in water generate a hydration ammonia; One hydration ammonia converges at the bottom of the tower of high-efficiency cyclone water scrubber, and the chilled water of recycling air conditioner refrigerating exchanges the heat of above-mentioned absorbing liquid for by the heat exchanger installed at the bottom of tower, make a hydration ammonia form low-temperature plasma absorbing liquid; Described low-temperature plasma absorbing liquid is NH 3+ NH 3h 2o+H 2o+NH 4 ++ OH -+ H +; Another part is sent at the bottom of the tower of efficient pickling tower from clarifier-tank gas airduct out and is carried out pickling absorption; In pickling absorption process, on the one hand, the low-temperature plasma absorbing liquid produced in ammonia absorption system sprays from tower top, contact to absorb with uprising gas or residual air at the bottom of efficient pickling tower and form water lotion, on the other hand, constantly in the middle part of efficient pickling tower, spray into the dilute sulfuric acid that mass percent concentration is 5-10% with washing pump from complex acid groove, water lotion and dilute sulfuric acid absorb uprising gas at the bottom of efficient pickling tower jointly; Have suffered liquid after the absorption that pickling absorption process produces, discharge at the bottom of the tower of efficient pickling tower and send sulphur ammonium holding vessel to recycle; Gas up to standard is discharged from the tower top of efficient pickling tower, then discharge after giving activated carbon adsorber to adsorb.
Particle, dust and ammonia soluble in water in tail gas, organic acid and other odor molecules soluble in water are mainly removed in the effect of clarifier-tank of the present invention, after above-mentioned process, smell substance in tail gas, particle are removed substantially, and the temperature and humidity of the tail gas discharged through above-mentioned process all obviously reduces.
The present invention's tail gas after dust removal process of lowering the temperature enters efficient pickling tower, owing to often carrying a large amount of mists secretly when tail gas leaves packing layer, not only consumes massive laundering liquid and dilute sulfuric acid solution, simultaneously for the rear charcoal absorption process of exhaust gas body is made troubles; Therefore the wire mesh demister of nylon is installed above efficient pickling inner-tower filling material layer, is used for removing the mist that the gas got rid of by tower top is carried secretly.
The invention has the beneficial effects as follows: the present invention adopts low-temperature plasma absorbing liquid as absorbent, its performance has material impact to absorption operation, because low-temperature plasma absorbing liquid should have larger solubility to solute, like this, for a certain amount of tail gas mist, required absorbent consumption can greatly reduce.In addition, because low-temperature plasma absorbing liquid solubility is large, viscosity is little, and the equilibrium partial pressure of solute is low, and the motive force of absorption process is large, and mass transfer rate is large, and therefore efficient pickling tower absorption equipment size can require very little.The present invention gives off the corresponding exhaust gas treating method of feature reasonable disposition of tail gas according to ammonium metavanadate roaster, and its vent gas treatment efficiency is higher.
Accompanying drawing explanation
Fig. 1 is process structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
A kind of ammonium metavanadate roaster gives off the recovery process of tail gas, on the roaster of ammonium metavanadate calcination department, arrange the tail gas of gas skirt to discharge collect, all floss holes in workshop are parallel to a total pipeline, total pipeline leads to the clarifier-tank causing outdoor through centrifugal high pressure air-introduced machine, carry out cooling dust removal process, exhaust temperature is down between 60 DEG C-80 DEG C; Send into ammonia absorption system from clarifier-tank gas part airduct out, in ammonia absorption system, first use water as absorbing liquid, under the rare earth coating catalytic action in high-efficiency cyclone water scrubber, make the reaction of ammonia in water generate a hydration ammonia; One hydration ammonia converges at the bottom of the tower of high-efficiency cyclone water scrubber, and the chilled water of recycling air conditioner refrigerating exchanges the heat of above-mentioned absorbing liquid for by the heat exchanger installed at the bottom of tower, make a hydration ammonia form the balanced body of three molecules and three ions, i.e. low-temperature plasma absorbing liquid; Described low-temperature plasma absorbing liquid is NH 3+ NH 3h 2o+H 2o+NH 4 ++ OH -+ H +; Another part is sent at the bottom of the tower of efficient pickling tower from clarifier-tank gas airduct out and is carried out pickling absorption; In pickling absorption process, on the one hand, the low-temperature plasma absorbing liquid produced in ammonia absorption system sprays from tower top, contact to absorb with uprising gas or residual air at the bottom of efficient pickling tower and form water lotion, on the other hand, constantly in the middle part of efficient pickling tower, spray into the dilute sulfuric acid that mass percent concentration is 5-10% with washing pump from complex acid groove, water lotion and dilute sulfuric acid absorb uprising gas at the bottom of efficient pickling tower jointly; Have suffered liquid after the absorption that pickling absorption process produces, discharge at the bottom of the tower of efficient pickling tower and send sulphur ammonium holding vessel to recycle; Gas up to standard is discharged from the tower top of efficient pickling tower, then discharge after giving activated carbon adsorber to adsorb.
Above-mentioned clarifier-tank is the underground water mud sump of sealing.
The specification of above-mentioned high-efficiency cyclone water scrubber: Φ 2000 × 7500mm, empty tower gas velocity <0.12m/s, filter area 3.1m 2; Single tower windage loss 10%, sprinkle density 10m 3/ m 2h, filler is the ceramic Pall ring of φ 50mm, and the ligule of ceramic Pall ring fenestra has samarium sesquioxide and lanthanum sesquioxide batch mixing rare earth coating, and wherein the mixed weight ratio of samarium sesquioxide and lanthanum sesquioxide is 2:1; High-efficiency cyclone water scrubber adopts counter-current operation, and namely gas phase enters and discharged by tower top at the bottom of tower, and liquid phase enters from tower top and discharges by the bottom of tower.
The specification of above-mentioned efficient pickling tower: Φ 1800 × 7500mm, empty tower gas velocity <0.15m/s, filter area 2.8m 2; Single tower windage loss 12%, sprinkle density 15m 3/ m 2h, packing layer is the polypropylene Pall ring of φ 50mm; The wire mesh demister of nylon is installed above packing layer; Efficient pickling tower adopts counter-current operation, and namely gas phase enters and discharged by tower top at the bottom of tower, and liquid phase enters from tower top and discharges by the bottom of tower.
The specification of above-mentioned activated carbon adsorber: ¢ 2000*3500mm.
The wire mesh demister of nylon is installed in the top of above-mentioned efficient pickling inner-tower filling material layer.
Present embodiment process tail gas efficiency can reach more than 90%, and the tail gas after process reaches " emission standard for odor pollutants " GB14554-93, " ambient air quality " (GB3095-1996).The required cost of the daily cleaning of present embodiment is few, runs, maintenance cost is low.The present invention independent of outside ammonium metavanadate roaster discharge tube, so do not need stopping production can carry out regular maintenance or cleaning to exhaust gas recovery system.A complete set of system is all equipped with special control, monitoring software, can monitor in real time the running status of system various piece.Meanwhile, system running state by electrical control cubicles manual adjustment device running status, or realizes long-range integrating control by built-in modem connection computer, is easy to operated by personnel.System is easy to integrated, can be applicable to various commercial Application, and energy perfection and other gas purifying equipment (as removed the equipment such as particle, ammonia in tail gas) perfect adaptation, reach very good tail gas clean-up effect.Expansion leeway has all been reserved in the design of equipment components, and equipment of being convenient to is upgraded in the future, function expands.
Finally should be noted that; above content is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; the simple modification that those of ordinary skill in the art carries out technical scheme of the present invention or equivalently to replace, does not all depart from essence and the scope of technical solution of the present invention.

Claims (6)

1. ammonium metavanadate roaster gives off a recovery process for tail gas, is on the roaster of ammonium metavanadate calcination department, to arrange the tail gas of gas skirt to discharge collect; It is characterized in that: all floss holes in workshop are parallel to a total pipeline, total pipeline leads to the clarifier-tank causing outdoor through centrifugal high pressure air-introduced machine, carry out cooling dust removal process, exhaust temperature is down between 60 DEG C-80 DEG C; Ammonia absorption system is sent into from clarifier-tank gas part airduct out; In ammonia absorption system, first use water as absorbing liquid, under the rare earth coating catalytic action in high-efficiency cyclone water scrubber, make the reaction of ammonia in water generate a hydration ammonia; One hydration ammonia converges at the bottom of the tower of high-efficiency cyclone water scrubber, and the chilled water of recycling air conditioner refrigerating exchanges the heat of above-mentioned absorbing liquid for by the heat exchanger installed at the bottom of tower, make a hydration ammonia form low-temperature plasma absorbing liquid; Described low-temperature plasma absorbing liquid is NH 3+ NH 3h 2o+H 2o+NH 4 ++ OH -+ H +; Another part is sent at the bottom of the tower of efficient pickling tower from clarifier-tank gas airduct out and is carried out pickling absorption; In pickling absorption process, on the one hand, the low-temperature plasma absorbing liquid produced in ammonia absorption system sprays from tower top, contact to absorb with uprising gas or residual air at the bottom of efficient pickling tower and form water lotion, on the other hand, constantly in the middle part of efficient pickling tower, spray into the dilute sulfuric acid that mass percent concentration is 5-10% with washing pump from complex acid groove, water lotion and dilute sulfuric acid absorb uprising gas at the bottom of efficient pickling tower jointly; Have suffered liquid after the absorption that pickling absorption process produces, discharge at the bottom of the tower of efficient pickling tower and send sulphur ammonium holding vessel to recycle; Gas up to standard is discharged from the tower top of efficient pickling tower, then discharge after giving activated carbon adsorber to adsorb.
2. a kind of ammonium metavanadate roaster according to claim 1 gives off the recovery process of tail gas, it is characterized in that: described clarifier-tank is the underground water mud sump of sealing.
3. a kind of ammonium metavanadate roaster according to claim 1 gives off the recovery process of tail gas, it is characterized in that: the specification of described high-efficiency cyclone water scrubber: Φ 2000 × 7500mm, empty tower gas velocity <0.12m/s, filter area 3.1m 2; Single tower windage loss 10%, sprinkle density 10m 3/ m 2h, filler is the ceramic Pall ring of φ 50mm, and the ligule of ceramic Pall ring fenestra has samarium sesquioxide and lanthanum sesquioxide batch mixing rare earth coating, and wherein the mixed weight ratio of samarium sesquioxide and lanthanum sesquioxide is 2:1; High-efficiency cyclone water scrubber adopts counter-current operation, and namely gas phase enters and discharged by tower top at the bottom of tower, and liquid phase enters from tower top and discharges by the bottom of tower.
4. a kind of ammonium metavanadate roaster according to claim 1 gives off the recovery process of tail gas, it is characterized in that: the specification of described efficient pickling tower: Φ 1800 × 7500mm, empty tower gas velocity <0.15m/s, filter area 2.8m 2; Single tower windage loss 12%, sprinkle density 15m 3/ m 2h, packing layer is the polypropylene Pall ring of φ 50mm; The wire mesh demister of nylon is installed above packing layer; Efficient pickling tower adopts counter-current operation, and namely gas phase enters and discharged by tower top at the bottom of tower, and liquid phase enters from tower top and discharges by the bottom of tower.
5. a kind of ammonium metavanadate roaster according to claim 1 gives off the recovery process of tail gas, it is characterized in that: the specification of described activated carbon adsorber: Φ 2000*3500mm.
6. a kind of ammonium metavanadate roaster according to claim 1 gives off the recovery process of tail gas, it is characterized in that: the wire mesh demister of nylon is installed in the top of described efficient pickling inner-tower filling material layer.
CN201410231597.0A 2014-05-29 2014-05-29 A kind of ammonium metavanadate roaster gives off the recovery process of tail gas Active CN103961997B (en)

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CN106215532A (en) * 2016-06-30 2016-12-14 重庆西亭科技有限公司 Industrial waste gas treatment device and technique
CN109173650A (en) * 2018-06-06 2019-01-11 柏美迪康环境科技(上海)股份有限公司 A kind of quenching waste gas processing method and system

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CN102872703A (en) * 2012-10-03 2013-01-16 黄立维 Device and process for purifying harmful gas through combining gas-liquid absorption with micro-electrolysis
CN203382515U (en) * 2013-05-14 2014-01-08 武汉百富环保工程有限公司 Ammonia recovery system based on saturation method

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